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78e1c91bb0
When trying to enable -debug-info-kind=constructor there was an assert
that occurs during debug info cloning ("mismatched subprogram between
llvm.dbg.value variable and !dbg attachment").
It appears that during llvm::CloneFunctionInto, a DISubprogram could be
duplicated when MapMetadata is called, and then added to the MD map again
when DIFinder gets a list of subprograms. This results in two different
versions of the DISubprogram.
This patch switches the order so that the DIFinder subprograms are
added before MapMetadata is called.
Fixes https://bugs.llvm.org/show_bug.cgi?id=46784
Differential Revision: https://reviews.llvm.org/D86185
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